在数学中,"rotate"可以用来描述向量或坐标系的旋转变换。 - To rotate a vector by 90 degrees counterclockwise, you can multiply it by a rotation matrix. (要逆时针旋转一个向量90度,你可以将它乘以一个旋转矩阵。) 这些是"rotate"的基本用法,但实际应用可能会根据上下文有所不同。©...
Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 题目要就地算法,那么可以通过折叠矩阵上下以及斜对角线折叠来实现,代码如下: 1classSolution {2public:3voidrotate(vector<vector<int>>&matrix) {4intsz =matrix.size();5if(!sz)return;6for(inti =0; i < sz; ...
Rotate the image by 90 degrees (clockwise). Follow up: Could you do this in-place? 思路分析: 最笨的方法,重新开辟一个矩阵空间,做旋转。(题目要求最好能就地旋转) 更好的方法:先将矩阵上下对折,然后再沿对角线对折。 例如: 1 2 3 7 8 9 7 4 1 4 5 6 -> 4 5 6 -> 8 5 2 7 8 9 ...
void rotate(vector<vector<int> > &A) { int m = A.size(); if(m<=0) return ; int n = A[0].size(); for(int i=0; i<m/2;++i){ for(int j=i; j<n-1-i; ++j){ int temp = A[i][j]; A[i][j] = A[n-1-j][i]; A[n-1-j][i] = A[n-1-i][n-1-j]; ...
实际上完成的就是A ->A'->A"->A"'->A ,实现四个区域的替换。所以外层循环从0~matrix.size()/2, 内层循环根据对角线从i ~ matrix.size() - i -1。 代码实现如下: class Solution { public: void rotate(vector<vector<int> > &matrix) { int n = matrix.size(); for(int i = 0; i < ...
1、reverse第一个数组到最后一个数组 2、对右上角三角形区域,做matrix[i][j]与matrix[j][i]换值 若是反时钟方向,则是对左上角三角形区域做转换。 void rotate(vector<vector<int>>& matrix) { int n = matrix.size(); reverse(matrix.begin(), matrix.end()); ...
pMatrixRotRefCombined->RotateZ(gamma);//Z Rotation (degrees)//This will again rotate a vector around z axis usign the right hand rule.pMatrixRotRefCombined->RotateX(alpha);//X Rotations (degrees)//This will rotate a vector usign the right hand rule round the x-axispMatrixRotRefCombined...
void rotate(vector<vector<int>>& matrix) { int n = matrix.size(); int a = 0; int b = n-1; while(a<b){ for(int i=0;i<(b-a);++i){ swap(matrix[a][a+i], matrix[a+i][b]); swap(matrix[a][a+i], matrix[b][b-i]); swap(matrix[a][a+i], matrix[b-i][a]);...
intidx=a; a=b; b=idx; } voidrotate(vector<vector<int>>&matrix) { intn=matrix.size(); if(n<=1) { return; } for(inti=0;i<n;i++) { for(intj=i;j<n;j++) { swap(matrix[i][j],matrix[j][i]); } } for(inti=0;i<n;i++) { ...
Rotation angle in degrees, specified as a real number. Example: rotate(g,90) refpoint— Reference point for rotation axis vector of two or three real numbers Reference point for a rotation axis, specified as a vector of two or three real numbers. The axis of rotation is the line in the...